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United States Patent | 6,104,232 |
Filip | August 15, 2000 |
Disclosed is a circuit and method for compensating DC output level variations in a differential emitter-coupled logic circuit. The DC output level compensating differential emitter-coupled logic circuit includes a differential pair, an output stage, and a compensation circuit. The differential pair is configured to receive a differential signal and is operative to generate a differential signal. The output stage is coupled to the differential pair to receive the differential signal and is operative to generate a differential output signal at a DC output voltage level. The compensation circuit is coupled to the differential pair and the output stage and is operative to develop a compensating voltage drop in the differential pair so as to compensate for a change in the DC output voltage level when the temperature varies such that the output stage outputs the differential output signal at the DC output voltage level.
Inventors: | Filip; Jan (Burgdorf, DE) |
Assignee: | Maxim Integrated Products (Sunnyvale, CA) |
Appl. No.: | 141334 |
Filed: | August 27, 1998 |
Current U.S. Class: | 327/513; 326/126; 327/378 |
Intern'l Class: | H01L 035/00 |
Field of Search: | 326/126 327/378,512,513,560,561,562,563,108 |
3946246 | Mar., 1976 | Marley | 307/218. |
4694198 | Sep., 1987 | Umeki | 307/290. |
4745304 | May., 1988 | Wilson | 307/455. |
4748346 | May., 1988 | Emori | 307/270. |
4806796 | Feb., 1989 | Bushey et al. | 307/455. |
4945265 | Jul., 1990 | Estrada | 307/455. |
5072136 | Dec., 1991 | Naghshineh | 307/455. |
5291075 | Mar., 1994 | Hollstein et al. | 307/443. |
5323068 | Jun., 1994 | Freitas | 307/455. |
5969579 | Oct., 1999 | Hartke et al. | 323/116. |